1 /*****************************************************************************
2 * demux.c: demuxer using ffmpeg (libavformat).
3 *****************************************************************************
4 * Copyright (C) 2004-2007 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_demux.h>
35 #include <vlc_stream.h>
39 #if defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
40 # include <libavformat/avformat.h>
41 #elif defined(HAVE_FFMPEG_AVFORMAT_H)
42 # include <ffmpeg/avformat.h>
45 #include "../../codec/avcodec/fourcc.h"
46 #include "../../codec/avcodec/chroma.h"
49 //#define AVFORMAT_DEBUG 1
51 /* Version checking */
52 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
54 #define HAVE_FFMPEG_CODEC_ATTACHMENT (LIBAVCODEC_VERSION_INT >= ((51<<16)+(50<<8)+0) )
56 /*****************************************************************************
57 * demux_sys_t: demux descriptor
58 *****************************************************************************/
78 /*****************************************************************************
80 *****************************************************************************/
81 static int Demux ( demux_t *p_demux );
82 static int Control( demux_t *p_demux, int i_query, va_list args );
84 static int IORead( void *opaque, uint8_t *buf, int buf_size );
85 static offset_t IOSeek( void *opaque, offset_t offset, int whence );
87 /*****************************************************************************
89 *****************************************************************************/
90 int OpenDemux( vlc_object_t *p_this )
92 demux_t *p_demux = (demux_t*)p_this;
100 pd.filename = p_demux->psz_path;
101 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 ) ) <= 0 )
103 msg_Warn( p_demux, "cannot peek" );
107 av_register_all(); /* Can be called several times */
110 if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
112 msg_Dbg( p_demux, "couldn't guess format" );
116 /* Don't try to handle MPEG unless forced */
117 if( !p_demux->b_force &&
118 ( !strcmp( fmt->name, "mpeg" ) ||
119 !strcmp( fmt->name, "vcd" ) ||
120 !strcmp( fmt->name, "vob" ) ||
121 !strcmp( fmt->name, "mpegts" ) ||
122 /* libavformat's redirector won't work */
123 !strcmp( fmt->name, "redir" ) ||
124 !strcmp( fmt->name, "sdp" ) ) )
129 /* Don't trigger false alarms on bin files */
130 if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
134 if( !p_demux->psz_path ) return VLC_EGENERIC;
136 i_len = strlen( p_demux->psz_path );
137 if( i_len < 4 ) return VLC_EGENERIC;
139 if( strcasecmp( &p_demux->psz_path[i_len - 4], ".str" ) &&
140 strcasecmp( &p_demux->psz_path[i_len - 4], ".xai" ) &&
141 strcasecmp( &p_demux->psz_path[i_len - 3], ".xa" ) )
147 msg_Dbg( p_demux, "detected format: %s", fmt->name );
149 /* Fill p_demux fields */
150 p_demux->pf_demux = Demux;
151 p_demux->pf_control = Control;
152 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
157 p_sys->i_pcr_tk = -1;
160 /* Create I/O wrapper */
161 p_sys->io_buffer_size = 32768; /* FIXME */
162 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
163 p_sys->url.priv_data = p_demux;
164 p_sys->url.prot = &p_sys->prot;
165 p_sys->url.prot->name = "VLC I/O wrapper";
166 p_sys->url.prot->url_open = 0;
167 p_sys->url.prot->url_read =
168 (int (*) (URLContext *, unsigned char *, int))IORead;
169 p_sys->url.prot->url_write = 0;
170 p_sys->url.prot->url_seek =
171 (offset_t (*) (URLContext *, offset_t, int))IOSeek;
172 p_sys->url.prot->url_close = 0;
173 p_sys->url.prot->next = 0;
174 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
175 0, &p_sys->url, IORead, NULL, IOSeek );
177 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
178 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
181 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
184 msg_Err( p_demux, "av_open_input_stream failed" );
185 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
186 CloseDemux( p_this );
190 if( av_find_stream_info( p_sys->ic ) < 0 )
192 msg_Err( p_demux, "av_find_stream_info failed" );
193 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
194 CloseDemux( p_this );
197 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
199 for( i = 0; i < p_sys->ic->nb_streams; i++ )
201 AVCodecContext *cc = p_sys->ic->streams[i]->codec;
205 const char *psz_type = "unknown";
207 if( !GetVlcFourcc( cc->codec_id, NULL, &fcc, NULL ) )
209 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
211 /* Special case for raw video data */
212 if( cc->codec_id == CODEC_ID_RAWVIDEO )
214 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
215 fcc = GetVlcChroma( cc->pix_fmt );
219 switch( cc->codec_type )
221 case CODEC_TYPE_AUDIO:
222 es_format_Init( &fmt, AUDIO_ES, fcc );
223 fmt.audio.i_channels = cc->channels;
224 fmt.audio.i_rate = cc->sample_rate;
225 fmt.audio.i_bitspersample = cc->bits_per_sample;
226 fmt.audio.i_blockalign = cc->block_align;
229 case CODEC_TYPE_VIDEO:
230 es_format_Init( &fmt, VIDEO_ES, fcc );
231 fmt.video.i_width = cc->width;
232 fmt.video.i_height = cc->height;
235 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
236 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
240 case CODEC_TYPE_SUBTITLE:
241 es_format_Init( &fmt, SPU_ES, fcc );
242 psz_type = "subtitle";
246 es_format_Init( &fmt, UNKNOWN_ES, 0 );
247 if( cc->codec_type == CODEC_TYPE_DATA )
249 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
250 else if( cc->codec_type == CODEC_TYPE_ATTACHMENT )
251 psz_type = "attachment";
253 msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
257 fmt.psz_language = strdup( p_sys->ic->streams[i]->language );
258 fmt.i_extra = cc->extradata_size;
259 fmt.p_extra = cc->extradata;
260 es = es_out_Add( p_demux->out, &fmt );
262 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
263 psz_type, (char*)&fcc );
264 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
267 msg_Dbg( p_demux, "AVFormat supported stream" );
268 msg_Dbg( p_demux, " - format = %s (%s)",
269 p_sys->fmt->name, p_sys->fmt->long_name );
270 msg_Dbg( p_demux, " - start time = %"PRId64,
271 ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
272 p_sys->ic->start_time * 1000000 / AV_TIME_BASE : -1 );
273 msg_Dbg( p_demux, " - duration = %"PRId64,
274 ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
275 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
280 /*****************************************************************************
282 *****************************************************************************/
283 void CloseDemux( vlc_object_t *p_this )
285 demux_t *p_demux = (demux_t*)p_this;
286 demux_sys_t *p_sys = p_demux->p_sys;
289 FREENULL( p_sys->tk );
291 b_avfmt_nofile = p_sys->fmt->flags & AVFMT_NOFILE;
292 p_sys->fmt->flags |= AVFMT_NOFILE; /* libavformat must not fopen/fclose */
293 if( p_sys->ic ) av_close_input_file( p_sys->ic );
294 if( !b_avfmt_nofile ) p_sys->fmt->flags ^= AVFMT_NOFILE;
296 free( p_sys->io_buffer );
300 /*****************************************************************************
302 *****************************************************************************/
303 static int Demux( demux_t *p_demux )
305 demux_sys_t *p_sys = p_demux->p_sys;
308 int64_t i_start_time;
311 if( av_read_frame( p_sys->ic, &pkt ) )
315 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
317 av_free_packet( &pkt );
320 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
325 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
327 if( pkt.flags & PKT_FLAG_KEY )
328 p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
330 i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
331 ( p_sys->ic->start_time * 1000000 / AV_TIME_BASE ) : 0;
333 p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
334 0 : (pkt.dts) * 1000000 *
335 p_sys->ic->streams[pkt.stream_index]->time_base.num /
336 p_sys->ic->streams[pkt.stream_index]->time_base.den - i_start_time;
337 p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
338 0 : (pkt.pts) * 1000000 *
339 p_sys->ic->streams[pkt.stream_index]->time_base.num /
340 p_sys->ic->streams[pkt.stream_index]->time_base.den - i_start_time;
342 #ifdef AVFORMAT_DEBUG
343 msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
344 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
348 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
350 p_sys->i_pcr_tk = pkt.stream_index;
351 p_sys->i_pcr = p_frame->i_dts;
353 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
356 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
357 av_free_packet( &pkt );
361 /*****************************************************************************
363 *****************************************************************************/
364 static int Control( demux_t *p_demux, int i_query, va_list args )
366 demux_sys_t *p_sys = p_demux->p_sys;
372 case DEMUX_GET_POSITION:
373 pf = (double*) va_arg( args, double* ); *pf = 0.0;
374 i64 = stream_Size( p_demux->s );
377 *pf = (double)stream_Tell( p_demux->s ) / (double)i64;
380 if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
382 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
387 case DEMUX_SET_POSITION:
388 f = (double) va_arg( args, double );
389 i64 = stream_Tell( p_demux->s );
390 if( p_sys->i_pcr > 0 )
392 i64 = p_sys->ic->duration * f;
393 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
394 i64 += p_sys->ic->start_time;
396 msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
398 /* If we have a duration, we prefer to seek by time
399 but if we don't, or if the seek fails, try BYTE seeking */
400 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
401 (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
403 int64_t i_size = stream_Size( p_demux->s );
404 i64 = (int64_t)i_size * f;
406 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
407 if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
410 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
411 p_sys->i_pcr = -1; /* Invalidate time display */
415 case DEMUX_GET_LENGTH:
416 pi64 = (int64_t*)va_arg( args, int64_t * );
417 if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
419 *pi64 = p_sys->ic->duration;
425 pi64 = (int64_t*)va_arg( args, int64_t * );
426 *pi64 = p_sys->i_pcr;
430 i64 = (int64_t)va_arg( args, int64_t );
431 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
432 i64 += p_sys->ic->start_time;
434 msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
436 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
440 es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
441 p_sys->i_pcr = -1; /* Invalidate time display */
446 vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
448 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
449 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
450 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
455 if( p_sys->ic->title[0] )
456 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
457 if( p_sys->ic->author[0] )
458 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
459 if( p_sys->ic->copyright[0] )
460 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
461 if( p_sys->ic->comment[0] )
462 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
463 if( p_sys->ic->genre[0] )
464 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
473 /*****************************************************************************
474 * I/O wrappers for libavformat
475 *****************************************************************************/
476 static int IORead( void *opaque, uint8_t *buf, int buf_size )
478 URLContext *p_url = opaque;
479 demux_t *p_demux = p_url->priv_data;
480 int i_ret = stream_Read( p_demux->s, buf, buf_size );
481 return i_ret ? i_ret : -1;
484 static offset_t IOSeek( void *opaque, offset_t offset, int whence )
486 URLContext *p_url = opaque;
487 demux_t *p_demux = p_url->priv_data;
488 int64_t i_absolute = (int64_t)offset;
489 int64_t i_size = stream_Size( p_demux->s );
491 #ifdef AVFORMAT_DEBUG
492 msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
500 i_absolute = stream_Tell( p_demux->s ) + offset;
503 i_absolute = i_size + offset;
513 if( i_absolute > i_size )
515 if( stream_Tell( p_demux->s ) >= i_size )
517 msg_Err( p_demux, "Seeking too far : EOF?" );
522 if( stream_Seek( p_demux->s, i_absolute ) )
527 return stream_Tell( p_demux->s );
530 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */